Dear maintainer,

During a test rebuild for CMake 4, chemps2 failed to rebuild.

Log Summary:
-------------------------------------------------------------------------------
[...]
CheMPS2_BINARY_DIR:STATIC=/build/reproducible-path/chemps2-1.8.12/obj-aarch64-linux-gnu

//Value Computed by CMake
CheMPS2_IS_TOP_LEVEL:STATIC=ON

//Value Computed by CMake
CheMPS2_SOURCE_DIR:STATIC=/build/reproducible-path/chemps2-1.8.12

//No help, variable specified on the command line.
ENABLE_XHOST:UNINITIALIZED=OFF

//No help, variable specified on the command line.
FETCHCONTENT_FULLY_DISCONNECTED:UNINITIALIZED=ON

//No help, variable specified on the command line.
HDF5_INCLUDE_DIRS:UNINITIALIZED=/usr/include/hdf5/serial


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dh_auto_configure: error: cd obj-aarch64-linux-gnu && DEB_PYTHON_INSTALL_LAYOUT=deb PKG_CONFIG=/usr/bin/pkg-config cmake -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=None -DCMAKE_INSTALL_SYSCONFDIR=/etc -DCMAKE_INSTALL_LOCALSTATEDIR=/var -DCMAKE_EXPORT_NO_PACKAGE_REGISTRY=ON -DCMAKE_FIND_USE_PACKAGE_REGISTRY=OFF -DCMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY=ON -DFETCHCONTENT_FULLY_DISCONNECTED=ON -DCMAKE_INSTALL_RUNSTATEDIR=/run -DCMAKE_SKIP_INSTALL_ALL_DEPENDENCY=ON "-GUnix Makefiles" -DCMAKE_VERBOSE_MAKEFILE=ON -DCMAKE_INSTALL_LIBDIR=lib/aarch64-linux-gnu -DCMAKE_INSTALL_LIBDIR=lib/aarch64-linux-gnu -DENABLE_XHOST=OFF -DBUILD_SPHINX=ON -DHDF5_INCLUDE_DIRS=/usr/include/hdf5/serial -DCMAKE_BUILD_TYPE=release .. returned exit code 1
make[1]: *** [debian/rules:17: override_dh_auto_configure] Error 2
make[1]: Leaving directory '/build/reproducible-path/chemps2-1.8.12'
make: *** [debian/rules:72: binary] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2
--------------------------------------------------------------------------------
Build finished at 2025-08-29T15:29:28Z
-------------------------------------------------------------------------------

The above is just how the build ends and not necessarily the most relevant part.
If required, the full build log is available here (for the next 30 days):
https://debusine.debian.net/artifact/2390243/

The most likely cause of build failures is the removed backwards compatibility for
CMake versions earlier than 3.5. You can find additional information in my
debian-devel announcement:

https://lists.debian.org/debian-devel/2025/04/msg00310.html

About the archive rebuild: The build was made on debusine.debian.net,
using sbuild.

You can find the build task here:
https://debusine.debian.net/work-request/152554/

If this is really a bug in one of the build-depends, please use
reassign and affects, so that this is still visible in the BTS web
page for this package.

Thanks,
Timo

I have downgraded the bug to non-RC severity temporarily and reverted
CMake in unstable to version 3.31.6. I plan to re-upgrade in about a
month's time. I realize that despite my April announcement, the upload
to unstable came rather surprising, and I don't want to cause
unnecessary pain.

Also, the build log URL has an unfortunate mistake. The correct URL
should include the workspace, i.e.,

https://debusine.debian.net/debian/developers/artifact/XXXX

CMake 4 will also be available in experimental again, so it can be
used to verify that the bug is fixed.

Cheers
Timo

Hello.

I wanted to do a team upload for this one for CMake 4, but there are
weird lintian errors which I don't know how to handle, for example:

E: libchemps2-dev: no-code-sections [usr/lib/x86_64-linux-gnu/libchemps2.a]
E: libchemps2-3t64: symbols-file-contains-current-version-with-debian-revision on symbol _ZN7CheMPS216DMRGSCFrotations9open_fileEPlS1_S1_iiNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE@Base (libchemps2.so.3) [symbols]

So, for now, I've just pushed a commit for the CMake 4 bug (tested)
and I wonder if somebody else could look at the lintian errors and
make the final upload.

Thanks.

I said:
upload and changed salsa-ci.yml to tell Salsa CI to ignore failures in
lintian.

Thanks.

We believe that the bug you reported is fixed in the latest version of
chemps2, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1112775@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Santiago Vila <sanvila@debian.org> (supplier of updated chemps2 package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Fri, 14 Nov 2025 18:24:00 +0100
Source: chemps2
Architecture: source
Version: 1.8.12-5
Distribution: unstable
Urgency: medium
Maintainer: Debichem Team <debichem-devel@lists.alioth.debian.org>
Changed-By: Santiago Vila <sanvila@debian.org>
Closes: 1112775
Changes:
 chemps2 (1.8.12-5) unstable; urgency=medium
 .
   * Team upload.
   * Fix build with CMake 4. Closes: #1112775.
   * d/control: Add missing BD on python3-numpy-dev.
   * d/control: Drop "Rules-Requires-Root: no" (default).
   * d/control: Drop "Priority: optional" (default).
   * d/control: Update standards-version.
   * d/salsa-ci.yml: Use the simplified version.
   * d/salsa-ci.yml: Temporarily allow lintian to fail.
Checksums-Sha1:
 a37b4968b67ca4548e1792856f5760a0e58ad4e4 2244 chemps2_1.8.12-5.dsc
 98ca6de0e031b45067c01fc72bf1dc90c64362df 15780 chemps2_1.8.12-5.debian.tar.xz
 2ac108846849dd80e9a1e99c17824534536cf2ba 8761 chemps2_1.8.12-5_source.buildinfo
Checksums-Sha256:
 a924cef68f9efc7a04151f1e6add8e0f649b5a409c904aa2723dcde400eb18bd 2244 chemps2_1.8.12-5.dsc
 6cd4a9df44e1288b6fa9f52cdfe44b1d6b5e8d267fc827f6130457ab0572dc39 15780 chemps2_1.8.12-5.debian.tar.xz
 6f47e74675f294ddfc7b355dc2df7a5aeef89b6f220808c60330872274499a81 8761 chemps2_1.8.12-5_source.buildinfo
Files:
 5328ad2180cd8156372ef60f52328a3c 2244 libs optional chemps2_1.8.12-5.dsc
 d42e759fc04eb813f8153fc705e837bb 15780 libs optional chemps2_1.8.12-5.debian.tar.xz
 0af0638548b9666be7b71586e545d2de 8761 libs optional chemps2_1.8.12-5_source.buildinfo
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Hi Maintainer

It looks like the autopkgtest also needs fixing [1].  I have copied
what I hope is the relevant part of the log below.

Regards
Graham

[1] https://ci.debian.net/packages/c/chemps2/testing/arm64/


 78s autopkgtest [02:55:40]: test libtest: [-----------------------
 79s
 79s SRCDIR="$(pwd)"
 79s cd $AUTOPKGTEST_TMP
 79s cat $SRCDIR/tests/test1.cpp.in | sed -e
"s/\${CMAKE\_SOURCE\_DIR}\/tests\/matrixelements\///" > upstream.cpp
 79s cp $SRCDIR/tests/matrixelements/N2.STO3G.FCIDUMP .
 79s cp $SRCDIR/debian/tests/CMakeLists.txt .
 79s
 79s cmake .
 79s CMake Error at CMakeLists.txt:1 (CMAKE_MINIMUM_REQUIRED):
 79s   Compatibility with CMake < 3.5 has been removed from CMake.
 79s
 79s   Update the VERSION argument <min> value.  Or, use the
<min>...<max> syntax
 79s   to tell CMake that the project requires at least <min> but has
been updated
 79s   to work with policies introduced by <max> or earlier.
 79s
 79s   Or, add -DCMAKE_POLICY_VERSION_MINIMUM=3.5 to try configuring anyway.
 79s
 79s
 79s -- Configuring incomplete, errors occurred!
 79s autopkgtest [02:55:41]: test libtest: -----------------------]
 79s autopkgtest [02:55:41]: test libtest:  - - - - - - - - - -
results - - - - - - - - - -
 79s libtest              FAIL non-zero exit status 1